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Employee Benefit Plans and Stock-based Compensation (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | May 31, 2013
Weighted Average Grant Date Fair Value [Roll Forward] |  |  |  |  |
Weighted-average grant date fair value of stock options granted (in dollars per share) | $ 1.17 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 1.09 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 1.79 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue |  |
Weighted average assumptions [Abstract] |  |  |  |  |
Expected term | 4 years 1 month 6 days | 4 years | 4 years |  |
Volatility (in hundredths) | 63.20%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate | 59.20%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate | 72.87%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate |  |
Expected dividend (in hundredths) | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate | 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate |  |
Risk-free interest rate (in hundredths) | 1.85%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate | 0.98%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate | 0.57%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate |  |
Retirement Savings Plan [Abstract] |  |  |  |  |
Period after which all full time employees are eligible to participate in the savings plan | 90 days |  |  |  |
Maximum percentage of employer matching contribution if employees contribute at least 6% of base pay (in hundredths) | 4.00%axti_MaximumPercentageOfEmployerMatchingContributionIfEmployeesContributeAtLeastSixPercent |  |  |  |
Minimum percentage of employee contribution to get 4% of employer's contribution (in hundredths) | 6.00%axti_MinimumPercentageOfEmployeeContributionToGetFourPercentOfEmployerSContribution |  |  |  |
Contributions to the retirement savings plans | $ 115,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | $ 110,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount | $ 900,000 us-gaap_DefinedContributionPlanEmployerDiscretionaryContributionAmount |  |
Common stock [Abstract] |  |  |  |  |
Common stock reserved for future issuance | 4,462,235 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Options outstanding, shares (in shares) | 3,198,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 3.12 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 |  |  |  |
Weighted-average Remaining Contractual Life | 6 years 11 months 12 days |  |  |  |
Options Vested and Exercisable Shares (in shares) | 1,859,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 3.46 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 |  |  |  |
Stock-based compensation in the form of employee stock options and restricted stock [Abstract] |  |  |  |  |
Total stock-based compensation | 1,129,000 us-gaap_AllocatedShareBasedCompensationExpense | 1,277,000 us-gaap_AllocatedShareBasedCompensationExpense | 1,215,000 us-gaap_AllocatedShareBasedCompensationExpense |  |
Tax effect on stock-based compensation | 0 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | 0 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | 0 us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense |  |
Net effect on net income | 1,129,000 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax | 1,277,000 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax | 1,215,000 us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax |  |
Shares used in computing basic net income per share (in shares) | 32,452,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 32,700,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 32,144,000 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic |  |
Shares used in computing diluted net income per share (in shares) | 32,452,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 32,700,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 32,865,000 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding |  |
Effect on basic net income per share (in dollars per share) | $ (0.03)axti_EffectOfStockBasedCompensationOnBasicEarningsPerShare | $ (0.04)axti_EffectOfStockBasedCompensationOnBasicEarningsPerShare | $ (0.04)axti_EffectOfStockBasedCompensationOnBasicEarningsPerShare |  |
Effect on diluted net income per share (in dollars per share) | $ (0.03)axti_EffectOfStockBasedCompensationOnDilutedEarningsPerShare | $ (0.04)axti_EffectOfStockBasedCompensationOnDilutedEarningsPerShare | $ (0.04)axti_EffectOfStockBasedCompensationOnDilutedEarningsPerShare |  |
$1.33 - $1.59 [Member] |  |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Range of exercise price, minimum (in dollars per share) | $ 1.33 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeOneMember |  |  |  |
Range of exercise price, maximum (in dollars per share) | $ 1.59 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeOneMember |  |  |  |
Options outstanding, shares (in shares) | 401,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeOneMember |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 1.52 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeOneMember |  |  |  |
Weighted-average Remaining Contractual Life | 3 years 3 months 29 days |  |  |  |
Options Vested and Exercisable Shares (in shares) | 401,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeOneMember |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 1.52 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeOneMember |  |  |  |
$1.91 - $1.91 [Member] |  |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Range of exercise price, minimum (in dollars per share) | $ 1.91 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTwoMember |  |  |  |
Range of exercise price, maximum (in dollars per share) | $ 1.91 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTwoMember |  |  |  |
Options outstanding, shares (in shares) | 4,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTwoMember |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 1.91 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTwoMember |  |  |  |
Weighted-average Remaining Contractual Life | 0 years 10 months 13 days |  |  |  |
Options Vested and Exercisable Shares (in shares) | 4,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTwoMember |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 1.91 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTwoMember |  |  |  |
$2.04 - $2.04 [Member] |  |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Range of exercise price, minimum (in dollars per share) | $ 2.04 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeThreeMember |  |  |  |
Range of exercise price, maximum (in dollars per share) | $ 2.04 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeThreeMember |  |  |  |
Options outstanding, shares (in shares) | 333,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeThreeMember |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 2.04 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeThreeMember |  |  |  |
Weighted-average Remaining Contractual Life | 4 years 9 months 25 days |  |  |  |
Options Vested and Exercisable Shares (in shares) | 333,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeThreeMember |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 2.04 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeThreeMember |  |  |  |
$2.14 - $2.29 [Member] |  |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Range of exercise price, minimum (in dollars per share) | $ 2.14 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFourMember |  |  |  |
Range of exercise price, maximum (in dollars per share) | $ 2.29 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFourMember |  |  |  |
Options outstanding, shares (in shares) | 252,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFourMember |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 2.26 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFourMember |  |  |  |
Weighted-average Remaining Contractual Life | 9 years 4 months 24 days |  |  |  |
Options Vested and Exercisable Shares (in shares) | 0 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFourMember |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 0 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFourMember |  |  |  |
$2.36 - $2.36 [Member] |  |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Range of exercise price, minimum (in dollars per share) | $ 2.36 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFiveMember |  |  |  |
Range of exercise price, maximum (in dollars per share) | $ 2.36 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFiveMember |  |  |  |
Options outstanding, shares (in shares) | 428,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFiveMember |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 2.36 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFiveMember |  |  |  |
Weighted-average Remaining Contractual Life | 8 years 10 months 2 days |  |  |  |
Options Vested and Exercisable Shares (in shares) | 116,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFiveMember |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 2.36 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeFiveMember |  |  |  |
$2.47 - $2.47 [Member] |  |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Range of exercise price, minimum (in dollars per share) | $ 2.47 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSixMember |  |  |  |
Range of exercise price, maximum (in dollars per share) | $ 2.47 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSixMember |  |  |  |
Options outstanding, shares (in shares) | 460,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSixMember |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 2.47 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSixMember |  |  |  |
Weighted-average Remaining Contractual Life | 9 years 10 months 2 days |  |  |  |
Options Vested and Exercisable Shares (in shares) | 0 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSixMember |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 0 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSixMember |  |  |  |
$2.91 - $2.91 [Member] |  |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Range of exercise price, minimum (in dollars per share) | $ 2.91 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSevenMember |  |  |  |
Range of exercise price, maximum (in dollars per share) | $ 2.91 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSevenMember |  |  |  |
Options outstanding, shares (in shares) | 444,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSevenMember |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 2.91 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSevenMember |  |  |  |
Weighted-average Remaining Contractual Life | 7 years 10 months 6 days |  |  |  |
Options Vested and Exercisable Shares (in shares) | 231,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSevenMember |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 2.91 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeSevenMember |  |  |  |
$3.18 - $4.09 [Member] |  |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Range of exercise price, minimum (in dollars per share) | $ 3.18 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeEightMember |  |  |  |
Range of exercise price, maximum (in dollars per share) | $ 4.09 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeEightMember |  |  |  |
Options outstanding, shares (in shares) | 29,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeEightMember |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 3.85 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeEightMember |  |  |  |
Weighted-average Remaining Contractual Life | 6 years 3 months 22 days |  |  |  |
Options Vested and Exercisable Shares (in shares) | 20,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeEightMember |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 3.84 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeEightMember |  |  |  |
$4.79 - $4.79 [Member] |  |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Range of exercise price, minimum (in dollars per share) | $ 4.79 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeNineMember |  |  |  |
Range of exercise price, maximum (in dollars per share) | $ 4.79 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeNineMember |  |  |  |
Options outstanding, shares (in shares) | 330,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeNineMember |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 4.79 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeNineMember |  |  |  |
Weighted-average Remaining Contractual Life | 6 years 9 months 25 days |  |  |  |
Options Vested and Exercisable Shares (in shares) | 262,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeNineMember |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 4.79 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeNineMember |  |  |  |
$4.81 - $7.82 [Member] |  |  |  |  |
Exercise price ranges of options outstanding and exercisable [Abstract] |  |  |  |  |
Range of exercise price, minimum (in dollars per share) | $ 4.81 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTenMember |  |  |  |
Range of exercise price, maximum (in dollars per share) | $ 7.82 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTenMember |  |  |  |
Options outstanding, shares (in shares) | 517,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTenMember |  |  |  |
Weighted-average Exercise Price (in dollars per share) | $ 5.79 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTenMember |  |  |  |
Weighted-average Remaining Contractual Life | 5 years 2 months 1 day |  |  |  |
Options Vested and Exercisable Shares (in shares) | 492,000 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTenMember |  |  |  |
Option Vested and Exercisable, Weighted-Average Exercise Price (in dollars per share) | $ 5.80 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = axti_PriceRangeTenMember |  |  |  |
Cost of revenue [Member] |  |  |  |  |
Stock-based compensation in the form of employee stock options and restricted stock [Abstract] |  |  |  |  |
Total stock-based compensation | 18,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember | 22,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember | 78,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_CostOfSalesMember |  |
Selling, general and administrative [Member] |  |  |  |  |
Stock-based compensation in the form of employee stock options and restricted stock [Abstract] |  |  |  |  |
Total stock-based compensation | 938,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember | 1,091,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember | 1,000,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_SellingGeneralAndAdministrativeExpensesMember |  |
Research and development [Member] |  |  |  |  |
Stock-based compensation in the form of employee stock options and restricted stock [Abstract] |  |  |  |  |
Total stock-based compensation | 173,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember | 164,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember | 137,000 us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_ResearchAndDevelopmentExpenseMember |  |
Stock Options [Member] |  |  |  |  |
Common stock [Abstract] |  |  |  |  |
Common stock reserved for future issuance | 3,197,840 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |  |  |  |
Restricted Stock [Member] |  |  |  |  |
Common stock [Abstract] |  |  |  |  |
Common stock reserved for future issuance | 261,497 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember |  |  |  |
1997 Stock Option Plan [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares authorized for issuance (in shares) | 5,423,583 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = axti_StockOptionPlanMember |  |  |  |
Terms of award | 10 years |  |  |  |
Number of shares available for grant (in shares) | 1,928,994 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = axti_StockOptionPlanMember |  |  |  |
1997 Stock Option Plan [Member] | Stock Options [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period, minimum | 4 years |  |  |  |
Vesting percentage as the end of first year (in hundredths) | 25.00%us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_StockOptionPlanMember |  |  |  |
Vesting percentage per month after first year (in hundredths) | 2.10%axti_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsPercentageEachMonthAfterYearOne / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_StockOptionPlanMember |  |  |  |
Award vesting rights | Options granted under the 1997 Plan generally vest 25% at the end of one year and 2.1% each month thereafter, with full vesting after four years. |  |  |  |
1997 Stock Option Plan [Member] | Restricted Stock [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period if vesting is based on a performance measure | 5 years |  |  |  |
2007 Equity Incentive Plan [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of shares authorized for issuance (in shares) | 1,300,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  | 2,000,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember
Terms of award | 10 years |  |  |  |
Number of shares available for grant (in shares) | 1,003,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
Common stock [Abstract] |  |  |  |  |
Common stock reserved for future issuance | 1,002,898 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
2007 Equity Incentive Plan [Member] | Stock Options [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period, minimum | 3 years |  |  |  |
Award vesting rights | Stock options or stock appreciation rights generally shall not be fully vested over a period of less than three years from the date of grant |  |  |  |
Number of options outstanding [Roll Forward] |  |  |  |  |
Options outstanding, beginning of period (in shares) | 2,671,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 2,727,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 2,380,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Granted (in shares) | 712,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 488,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 592,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Exercised (in shares) | (111,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | (331,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | (136,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Canceled and expired (in shares) | (74,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | (213,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | (109,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Options outstanding, end of period (in shares) | 3,198,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 2,671,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 2,727,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 2,380,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |
Options vested and expected to vest as of December 31, 2014 (in shares) | 3,198,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
Options exercisable as of December 31, 2014 (in shares) | 1,859,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
Weighted average exercise price [Roll Forward] |  |  |  |  |
Options outstanding, beginning of period (in dollars per share) | $ 3.29 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 3.28 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 3.25 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Granted (in dollars per share) | $ 2.40 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 2.38 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 3.32 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Exercised (in dollars per share) | $ 1.21 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 1.62 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 2.17 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Canceled and expired (in dollars per share) | $ 5.18 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 3.60 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 4.25 us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Options outstanding, end of period (in dollars per share) | $ 3.12 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 3.29 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 3.28 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 3.25 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |
Options vested and expected to vest as of December 31, 2014 (in dollars per share) | $ 3.12 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
Options exercisable as of December 31, 2014 (in dollars per share) | $ 3.46 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
Weighted average Remaining Contractual Life [Abstract] |  |  |  |  |
Options outstanding, beginning of period | 6 years 11 months 12 days | 6 years 8 months 16 days | 6 years 8 months 16 days | 6 years 3 months |
Options outstanding, end of period | 6 years 11 months 12 days | 6 years 8 months 16 days | 6 years 8 months 16 days | 6 years 3 months |
Options vested and expected to vest, end of period | 6 years 11 months 12 days |  |  |  |
Option exercisable, end of period | 5 years 5 months 23 days |  |  |  |
Aggregate Intrinsic Value [Abstract] |  |  |  |  |
Options outstanding, beginning of period | 893,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 1,353,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 3,456,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Options outstanding, end of period | 1,247,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 893,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 1,353,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 3,456,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |
Options vested and expected to vest, end of period | 1,247,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
Options exercisable, end of period | 821,000 us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1 / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
Intrinsic value of options exercised | 105,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 331,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 392,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Compensation costs related to unvested stock options not yet recognized | 1,600,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
Value of estimated forfeitures | 57,000 axti_ShareBasedCompensationNonvestedAwardsEstimatedForfeitures / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
Weighted-average period of amortization | 2 years 9 months 18 days |  |  |  |
2007 Equity Incentive Plan [Member] | Restricted Stock [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period, minimum | 3 years |  |  |  |
Vesting period if vesting is based on a performance measure | 12 months |  |  |  |
Award vesting rights | Restricted stock, restricted stock units, and performance awards generally shall not vest faster than over a three-year period (or a twelve-month period if vesting is based on a performance measure) |  |  |  |
Shares [Roll Forward] |  |  |  |  |
Non-vested, beginning of period (in shares) | 241,232 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 238,723 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 223,127 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Granted (in shares) | 121,044 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 103,636 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 113,768 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Vested (in shares) | (100,779)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | (85,127)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | (98,172)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Forfeited (in shares) |  | (16,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |
Non-vested, end of period (in shares) | 261,497 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 241,232 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 238,723 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Weighted Average Grant Date Fair Value [Roll Forward] |  |  |  |  |
Non-vested, beginning of period (in dollars per share) | $ 3.44 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 4.27 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 4.47 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Granted (in dollars per share) | $ 2.34 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 2.52 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 3.18 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Vested (in dollars per share) | $ 4.01 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 4.56 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 3.42 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Forfeited (in dollars per share) |  | $ 4.03 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |
Non-vested, end of period (in dollars per share) | $ 2.71 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 3.44 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | $ 4.27 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Total fair value of restricted stock awards vested | 405,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 389,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember | 336,000 us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |
Unrecognized compensation expense related to restricted stock awards | $ 596,000 us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockMember / us-gaap_PlanNameAxis = axti_EquityIncentivePlanMember |  |  |  |
Weighted average remaining contractual terms | 2 years 6 months |  |  |  |

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- Definition Percentage of vesting of share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section D -Subsection 2 + Details
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